How long did the Lábrea fire last?

According to the heat detections seen by satellite, it burned from 1 October 2026 to 18 October 2026 (18 days between the first and the last detection). There is no perimeter yet to date it.

How much area did it burn?

There is no perimeter yet. Heat detections rebuild about 4,228 hectares with fire (42.3 km²), a rough figure; GWIS will give its own when it publishes the perimeter, which can take several days.

Which municipalities burned?

The fire entered 2 municipalities: Lábrea (4,228 ha, 0.1 %); Porto Velho (0 ha, 0.0 %).

Is the Lábrea fire still active?

No fire detections since 19 Oct 2026, 06:22 UTC. A lack of detections is not an official extinction.

What was the weather like?

During the fire the temperature reached 37.2 °C, humidity dropped to 36 % and gusts hit 35 km/h. The fire danger index (FWI) reached 6, class Low.

Where does this data come from?

From the GWIS (Copernicus) burnt perimeter, NASA FIRMS VIIRS hotspots and the administrative boundaries of Brazil (geoBoundaries). It is not an official report.

BR · Brazil · 2026-10-01 → 2026-10-18

Lábrea fire, October 2026 Lábrea, Porto Velho

Out · last detection 19 Oct 2026, 06:22 UTC

Satellites first detected fire on 1 October 2026 in Lábrea, Brazil. It has been active for 18 days, with 448 heat detections and an area with fire of about 4,228 hectares rebuilt from them, spread across 2 municipalities.

GWIS (Copernicus) has not yet published the perimeter of this fire. It rebuilds it from hotspots, which can take several days, and it does not always arrive. For now the area is the one rebuilt from heat detections (about 14 hectares per pixel). If the perimeter arrives, this page picks it up on its own and keeps the same address.

Area with fire: ≈ 4,228ha; rebuilt from hotspots, no official perimeter yet
Duration: 18days; 1 Oct 2026 – 18 Oct 2026
Municipalities hit: 2; municipalities
Started on: 1 Oct; 2026
Heat detections: 448; in a single hotspot: 567 MW
Danger at start: 1; Very low · FWI index
Energy released: 5.8GW; sum of detected power

Play back 19 Oct 2026

HOTSPOTS BY DAY 1 Oct18 Oct

How it evolved, day by day

234567891112131415161819

Fire radiative power detected each day, in megawatts, and number of hotspots. The magenta bar marks the peak day.

The weather it burned in

37°high

35km/h · peak gust

36%lowest humidity

It had gone one day without rain (1 mm or more) when it started.

What happened to each town

Lábrea 45,448 inhabitants where it started

4,228 ha reached on 1 Oct

0.1 %
Porto Velho 460,434 inhabitants

0 ha reached on 6 Oct

0.0 %

Area with fire inside each municipality, rebuilt from heat detections (about 14 hectares per VIIRS pixel). An estimate until the official perimeter arrives. The distance is from the town centre to the nearest fire: staying a kilometre away does not mean it reached the houses.

The weather day by day

ECMWF ERA5 reanalysis at the fire location, the standard reference for past weather, and the Canadian Fire Weather Index (the same system Copernicus uses), computed by WorldFires from that data. Days after the fire run until the first rain.

Open-Meteo.com (CC BY 4.0) · Copernicus Climate Change Service (ERA5)

Day	High	Min. humidity	Peak gust	Rain	Danger (FWI)
1 Oct	32.7 °C	55 %	26 km/h	5.5 mm	Very low 1
2 Oct	34.2 °C	51 %	30 km/h	2.3 mm	Very low 1
3 Oct	34.2 °C	46 %	28 km/h	5.7 mm	Very low 1
4 Oct	35.9 °C	49 %	35 km/h	4.3 mm	Very low 1
5 Oct	36.4 °C	45 %	31 km/h	0.4 mm	Low 6
6 Oct	35.8 °C	40 %	26 km/h	4.2 mm	Very low 2
7 Oct	35.7 °C	42 %	34 km/h	4.3 mm	Very low 2
8 Oct	36.5 °C	40 %	30 km/h	2.8 mm	Very low 3
9 Oct	34.8 °C	54 %	23 km/h	5.9 mm	Very low 1
10 Oct	36.4 °C	36 %	23 km/h	0.0 mm	Low 6
11 Oct	37.2 °C	36 %	27 km/h	8.6 mm	Very low 1
12 Oct	32.8 °C	69 %	35 km/h	10.1 mm	Very low 0
13 Oct	33.7 °C	47 %	29 km/h	3.9 mm	Very low 0
14 Oct	35.9 °C	41 %	27 km/h	2.7 mm	Very low 1
15 Oct	36.5 °C	38 %	23 km/h	3.0 mm	Very low 2
16 Oct	32.4 °C	63 %	22 km/h	11.0 mm	Very low 0
17 Oct	31.0 °C	69 %	27 km/h	2.0 mm	Very low 0
18 Oct	33.5 °C	48 %	25 km/h	1.1 mm	Very low 2
19 Oct after	32.5 °C	55 %	22 km/h	0.7 mm	Very low 3

Before and after, from space

Drag the line to compare the same ground before the fire and after it.

↔

Before · 24 Sept 2026

After · 23 Oct 2026

Before After

If the day is cloudy, change the date: each satellite passes once a day. In false colour the burnt ground looks brown or red.

The smoke

CAMS · Copernicus

On 9 October 2026 the air beside the fire reached 136 µg/m³ of PM2.5. That day averaged 78: 5.2 times the WHO daily guideline (15).

PM2.5 peak136 µg/m³

Days over the guideline15 days

PM10137 µg/m³

Optical depth1.75

WHO 15

2930123456789101112131415161718

Good Fair Moderate Poor Very poor Extremely poor

Particles from the Copernicus CAMS model at the centre of the perimeter; these are not measurements in each town. The pale bar is the worst hour, the solid one the daily average.

Open-Meteo.com (CC BY 4.0) · Copernicus Atmosphere Monitoring Service (CAMS)

Detections table · 448Every satellite heat detection, one by one, with time, satellite, power and coordinates.

⬇ Download CSV Times in UTC. Each detection is a 375 m pixel: a large fire yields hundreds per pass.

Date and time	Satellite	FRP (MW)	Lat	Lon

Other fires nearby

All fires in Brazil ›

Frequently asked questions

How long did the Lábrea fire last?: According to the heat detections seen by satellite, it burned from 1 October 2026 to 18 October 2026 (18 days between the first and the last detection). There is no perimeter yet to date it.
How much area did it burn?: There is no perimeter yet. Heat detections rebuild about 4,228 hectares with fire (42.3 km²), a rough figure; GWIS will give its own when it publishes the perimeter, which can take several days.
Which municipalities burned?: The fire entered 2 municipalities: Lábrea (4,228 ha, 0.1 %); Porto Velho (0 ha, 0.0 %).
Is the Lábrea fire still active?: No fire detections since 19 Oct 2026, 06:22 UTC. A lack of detections is not an official extinction.
What was the weather like?: During the fire the temperature reached 37.2 °C, humidity dropped to 36 % and gusts hit 35 km/h. The fire danger index (FWI) reached 6, class Low.
Where does this data come from?: From the GWIS (Copernicus) burnt perimeter, NASA FIRMS VIIRS hotspots and the administrative boundaries of Brazil (geoBoundaries). It is not an official report.

Where to verify it

A satellite detection is not an official report. Final figures and the fire’s status are published by each country’s emergency service.

Emergency number: 193

INPE · Programa Queimadas ↗
IBAMA · Prevfogo ↗

Satellite cross-check

NASA FIRMS ↗
GWIS · Copernicus ↗

Does something look wrong on this page?

This page is built from satellite data and official records, and it sometimes gets things wrong: the wrong dates, the wrong town, two fires merged into one, or something that was not a wildfire at all. If you know this fire first-hand (you live nearby, saw it, fought it or reported on it), tell us what really happened and we will check it.

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What do you think is wrong?

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What really happened?

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We will only use your email to reply about this report. Privacy. This is not an emergency service: if there is a fire now, call 193.

Where this data comes from

The perimeter comes from the Copernicus Global Wildfire Information System (GWIS), which rebuilds it from MODIS and VIIRS heat detections and publishes it under CC BY 4.0. It is not measured on imagery as in Europe, so it is an estimate. Heat detections come from the VIIRS sensors aboard Suomi-NPP and NOAA-20, distributed by NASA FIRMS at 375 m resolution. Municipal boundaries come from geoBoundaries ADM2 (Creative Commons Attribution 3.0 Intergovernmental Organisations (CC BY 3.0 IGO)). The area per municipality is computed by WorldFires by crossing the perimeter with those boundaries, so it may differ from each country’s official figure.

Where it burned